Pipe-coupling



(No Model.)

VL. ZISTEL.

' PIPE GOUPLING. No. 284,350. Patented Sept. 4. 1883.

N, Perris Pmwwnmmn wnhinghn. n. c,

` A UNITED STATES i PATENT OFFICE.

LOUIS ZISTEL, OF SANDUSKY, OHIO.

`Pl PE--COU PLLNG.

ASPECIFICATION forming` part `-of Letters Patent No. 284,350, dated September 4, 1883.

Application filed February 211883. (No model.)

I To all whom, it may concern: Beit known that I, LoUIs ZIsrEL, of ASandusky, in the county of `Erie and State otLOhio,

have `invented new and useful Improvements i 5 in Pipe-Couplings; and I do hereby declare that the following is afull, clear, and exact description thereof, `reference being had tothe accompanying drawings, which form a part of `this specification.

This invention relates to certain new and y useful improvements'in `couplings for coupling iron and lead pipes together.

The invention consists in the peculiar construction of the coupling and'its operation, as more fully hereinafter described.

Figure l is a longitudinal central section of a'pcrfeeted joint between the lead and the iron I pipeformedby myimproved coupling. Fig. 2 is an elevation of the coupling detached and partially in section.. inner end of the ironpipe.

In the accompanying drawings, which form a part of this specification, A represents a cast- Inetal coupling interiorly threaded at one end, as shown at rin Figs. l and 2, while the bore at the` opposite end is smooth, asshown at b. In casting this coupling, or it may be turned out after` the coupling is cast, thereis formed an annular conical recess, c, between the threaded and the smooth bores of the coupling.

" B is the iron pipe, with a threaded end, d,

to engage with the threaded end of the coup` ling, and this end of the pipe is preferably beveled, i as shownat e in Figs. l and 3.

C is the lead pipe 4to be coupled to the iron pipe, as follows: The lead' pipe` is inserted through the smooth end of the coupling until its inserted end is opposite, or nearly so, the farthest end of the conical recess.

the conical recess. Then the iron pipeis Fig. 8 is asection of ther l The lead i `4.o pipe is then `distended with a tool until it fills screwed to place, the beveled end thereof enteringthe end of the lead `pipe until a tight joint is obtained.

It will beiseen that with the couplingfformed with an enlarged conical chamber an ordinary iron pipe can be used, the recess allowing of the lead pipe being iiared, which will permit the iron pipe to enter the end ofthe lead pipe and secure it in place, while without this recess an ordinary pipe would tend to push the lead pipe ,out of the coupling, unless the iron pipe was reduced, in which case the passage would be obstructed, while in my invention there isa perfectly clear passage of uniform bore.

I am aware of English Patent N o. 11,728 of 1847, and make no`-claim to the construction shown therein.`

What I claim as my invention isl. As a new article of manufacture, a pipecoupling for the purposes described, provided with a smooth bore at one end, a,threaded bore at the opposite end, both of substantially the same diameter, `and a conical chamber in the 65 body of said coupling, larger than the greatest diameter of the thread, with the base of said conical chamber at the threaded end thereof, substantially as described.

2. The combination of the coupling A, pro-A 7o` I vided with asmooth bore at one end, a threaded bore at the other, and a conical chamber between the two, larger than the greatest diameter Iof the thread, with the pipe c, having itsr end expanded the full size of said conical `7 5 chamber, and the pipe B, having a threaded end and uniform bore, substantially as described.

LOUIS ZISTEL. Vitnesses:

H. Si. SPRAGUE, i E. W. ANDREws. 

